Climbers Alex Honnold and Tommy Caldwell embark on an expedition to conquer Alaska's treacherous Devils Thumb, pushing their limits through perilous climbs across daunting p 　　Climbers Alex Honnold and Tommy Caldwell embark on an expedition to conquer Alaska's treacherous Devils Thumb, pushing their limits through perilous climbs across daunting peaks, while their unbreakable bond is put to the ultimate test. 详情